#coding=utf-8
from bs4 import BeautifulSoup
import re
import urllib.parse



class HtmlParser(object):
    
    def __init__(self):
        pass
    
    
    def _get_new_urls(self, page_url, soup):
        new_urls = set()
        
        links = soup.find_all('a',href=re.compile(r"/view/\d+\.htm"))
        for link in links:
            new_url = link['href']
            new_full_url = urllib.parse.urljoin(page_url, new_url, allow_fragments=True)
            new_urls.add(new_full_url)
        return new_urls
    
    
    def _get_new_data(self, page_url, soup):
        res_data = {}
        res_data['url'] = page_url
        
        title_node = soup.find(name = 'dd',attrs={'class':'lemmaWgt-lemmaTitle-title'}).find('h1')
        res_data['title'] = title_node.get_text().encode('utf-8')
        
        summary_node = soup.find('div',class_="lemma-summary")
        res_data['summary'] = summary_node.get_text().encode('utf-8')
        return res_data
    
        
    
    
    def parse(self,page_url,html_cont):
        if page_url is None or html_cont is None:
            return
        
        soup = BeautifulSoup(html_cont,'html.parser',from_encoding='utf-8')
        new_urls = self._get_new_urls(page_url,soup)
        new_data = self._get_new_data(page_url,soup)
        
        return new_urls,new_data
    
    



